# Copyright 2022 Huawei Technologies Co., Ltd.
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# Copyright (c) OpenMMLab. All rights reserved.
from mmcv.parallel import is_module_wrapper
from mmcv.runner import HOOKS, Hook


@HOOKS.register_module()
class SetEpochInfoHook(Hook):
    """Set runner's epoch information to the model."""

    def before_train_epoch(self, runner):
        epoch = runner.epoch
        model = runner.model
        if is_module_wrapper(model):
            model = model.module
        model.set_epoch(epoch)
